44
TC5-1N5FAB rev.06
TC5-1N5FAB
Offset Stage 3
Curtains close
in timer mode
Room
Temperature
Set Point = 75
o
F
Curtains
89
o
F
OFF
Curtains open
in timer mode
0.3
o
F
0.3
o
F
79
o
F
Dead Band
Ban Diff. 2
FLOATING STAGE 3
This feature is enabled if the dipswitch #10 is turned on. It allows to
operate the curtains after the stage 2 instead of after the stage 3. In this
case, an offset must be defined for stage 3. This offset determines the
temperature at which temperature the stage 3 returns to a stop. The dead
band starts at Set Point + Ban Diff.2.
In the example above, when the temperature rises up to 89
o
F, the cur-
tains begin to open and continue to do so until fully open if the tempera-
ture remains above this point. If the temperature drops to 88.7
o
F, the
curtains stop opening. When the temperature falls to the beginning of
Offset 3 (79
o
F), the curtains begin to close and continue to do so until
fully closed if the temperature remains below this point. If the tempera-
ture rises to 79.3
o
F, the curtains stop closing. The dead band begins at
Ban Differential 2.
If internal switch # 9 is set to ON, a signal is sent to the PF-5 to close the
air inlets when the curtains begin opening. When the temperature falls to
the temperature at which the curtains close, the PF-5 resumes normal
operations (this applies only to users with a PF-5 controller connected to
the TC5-1N5FAB).
29
TC5-1N5FAB rev.06
TC5-1N5FAB
This feature also applies when the minimum ventilation speed is activated.
Note that for the compensation to take place, the compensation feature
must be activated by the user. When a compensation is applied to the
minimum speed, the compensation pilot light turns on.
Relative
Humidity
Relative
Humidity
Set Point
Stage 1
Min. Speed
Compensation begins
0%
100%
Normal
Min. Speed
Compensation %
10 %
H
UMIDITY COMPENSATION
The stage 1 minimum speed can be adjusted automatically as a function of
relative humidity. As humidity increases, the stage 1 minimum speed in-
creases proportionally to compensate for the change. At humidity levels at
or below the humidity set point, stage 1 minimum speed is equal to the
normal uncompensated speed. The user specifies the percentage increase
in minimum speed for a relative humidity equal to the humidity set point +
10%. For example, if the minimum speed is 40% and the compensation
adjustment is 30%, the minimum speed will be adjusted to 70% of full
speed when the humidity rises 10% above the humidity set point. In addi-
tion to adjusting the minimum speed, the humidity compensation feature
also changes the operation of the minimum ventilation cycle: if the control-
ler is operating in minimum ventilation mode when the relative humidity
exceeds the humidity set point, the minimum ventilation fans are operated
continuously rather than cycled.